Are you developing a custom Document Service Component for LiveCycle? If so, you are not in the right place, you may want to find a more appropriate forum here: http://forums.adobe.com
If this is about something different, please provide more information. Acrobat does not use Java, it uses JavaScript - similar name, but completely different language and environment, so updating Java should not have any effect on Acrobat.
Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com